Spotdox is an add-on to Dropbox that allows you to access any file on your computer (or any drives attached to it) from any location or device.

Never get stuck without that important file or folder. Simply download Spotdox, run it on your Mac and you never have to worry again. Dropbox full? Now you can move stuff off Dropbox and onto your Mac from any phone or web browser. For instance upload photos while on the road to Dropbox and transfer them to your Mac, freeing up space.